Stove



E. J. THER Sept. 15, 1942.

S TOVE Filed May 6, 1940 2 Sheets-Sheet l ENTOR.

ATTORNEYS E. J. THER Se t. 15, 1942.

STOVE Filed May 6, 1940 2 Sheets-$heet 2 3 gage/26y Patentecl Sept. 15, 1942 UNITED STATES PATENT OFFICE STOVE Eugene J. Ther, Chicago, 111.

Application May 6, 1940, Serial No. 333,545

8 Claims.

My invention relates to stoves and is particularly concerned with new and useful improvements in stoves for burning a solid fuel such as coal, coke, fuel briquettes, and the like.

Coal and similar solid fuel burning stoves of various types of construction have long been known and extensively used. Some have been characterized by relative simplicity in construction and others have been rather complicated.

All of them have, to my knowledge, however,

possessed the disadvantage of requiring frequent attention for the purpose of replenishing the supply of fuel or for ash removal.

In accordance with my present invention, the various disadvantages in coal burning stoves or other stoves burning a solid fuel which have heretofore existed are largely obviated. I have provided a novel stove which is inexpensive to manufacture since the construction is relatively simple and the parts few in number, which burns slowly and maintains an even, uniform heat, is exceedingly economical in its fuel consumption, and which requires a minimum of attention.

In general, my novel stove-construction comprises an outer housing or casing in the lower part of which is a grate and below which is an ash pit. The coal or the like is supplied to the stove through an opening at the top of the housing, said opening being closed by a suitable door. Disposed in heat conducting relation to the fuel bed are two pipes or conduits. One of these pipes or conduits serves to admit air to the interior of the stove housing, the admission of air being regulated by suitable valve or like means whereby the rate of combustion is controlled. The other pipe communicates with an outlet pipe or flue or chimney and serves, among other purposes, to conduct the burned gases to the chimney.

The features of my novel stove will best be understood in connection with the accompanying drawings wherein Figure 1 is a front elevation of my novel stove;

Figure 2 is a vertical sectional view taken along the line 2-2 of Figure 1, looking in the direction of the arrows;

Figure 3 is a partial sectional View taken along the line 3-3 of Figure 2, looking in the direction of the arrows;

Figure 4 is an enlarged sectional view taken along the line 4-4 of Figure 3, looking in the direction of the arrows and showing the construction of the air inlet control means;

Figure 5 is a vertical sectional view taken along the line 5-5 of Figure 2, looking in the direction of the arrows;

Figure 6 is a horizontal sectional View taken along the line 6--6 of Figure 2, looking in the direction of the arrows; and

Figure '7 is a horizontal sectional view taken along the line l-l of Figure 2, looking in the direction of the arrows.

As shown in the drawings, the stove comprises a housing or casing Ill having a square cross section and supported on suitable legs .H or the like, it being understood that the shape of the casing I0 may be varied as desired. The front of the casing I0 is provided at its lower portion with a door l2 through the doorway of which the ashes are removed, the lower portion of the casing l0 comprising an ash pit, a suitable receptacle l3 provided with a handle [4 serving to receive the ashes and being adapted readily and conveniently to be removed from the casing It] for cleaning out the ashes.

The upper part of the front of the casing 10 is provided with an aperture or opening which is adapted to be closed by the door 16, the starting of the stove being accomplished by passing ignited paper or the like, as hereinafter pointed out, through said opening. At the top of the casing is an opening through which the coal or the like is fed or introduced into the casing, said opening being adapted to be closed by the door ll.

A grate I8 is disposed in the lower part of the casing Ill and is supported in any convenient way as, for example, by means of angle irons I9 suitably affixed to the interior of the casing It.

Since, in view of the constructional features here inafter pointed out, the ash receptacle I3 does not extend across the entire width of the ash pit proper, a deflecting plate 2|, as shown more particularly in Figure 5, is provided to insure that the ashes passing through the grate l8 will drop into the receptacle I3.

A vertical pipe or conduit 22 is located within the casing Ill at any suitable place, either at the side and front, as shown in the drawings, or at the rear of the casing It! or at any other desired or convenient point. This pipe or conduit 22 serves to admit fresh air and is, therefore, open to the atmosphere at its lower portion, as shown more particularly in Figure 3. It will be seen that the fresh air inlet opening is below the level of the grate l8 and it will further be seen that the top of the pipe or conduit 22 extends into the upper portion of the casing, above the top surface of the coal bed. The pipe or conduit 22 is suitably afiixed to the casing It by screws or rivets 2d. The extent of the opening 23, which determines the rate of combustion of the coal or the like, is controlled by means of a valve-like arrangement, shown in enlarged section in Figure 4. This comprises a sliding plate assembly made up of an outer plate 26 and an inner plate 21. The outer plate 26 is provided with central boss 28 having a threaded aperture through which a threaded operating and locking member 29 passes. The inner end of the member 29 is recessed for reception of a pin 3! which is fixed to the inner plate 2i. The plate assembly is vertically slidable in the channel 32. It will be seen that, by loosening the screw threaded locking member 29, the plate assembly 26, 21 can be moved up or down in the channel 32 so as to control the extent of the opening 23 of the pipe 22 to the fresh air. The plate assembly may then be locked in place by tightening the member 29 in which case the plate 2'! is forced against the edges of the pipe 22.

Located in the casing l and in heat conducting relation to the fuel bed is a vertical pipe or conduit 33 which is preferably located at the rear of the stove housing. As shown more particularly in Figure 2, it will be seen that the open bottom of the pipe 33 extends to a point slightly below the grate I8 and that the open top of. the pipe is bent at approximately a right :3.

angle and extends slightly into a section 34 which is connected to the, outlet flue or chimney 36. The pip-e 33 serves to carry the gases from the stove to the chimney 36. The pipe 33 is heated by the hot fuel bed and as the gases rise in and pass through the pipe 33 they create a region of lower pressure below the grate or in the ash pit. A butterfly valve 31 is located in the section 34 and is operated through a handle member38.

In operating the stove, the door I I is first opened and the stove is filled with coal or coal briquettes or the like to a height represented by the letter A in Figure 2. Through the door It some paper and kindling wood are placed on top of the coal and then a small amount of coal is placed on top of the kindling wood. The door I! is then tightly closed, the butterfly valve 37 is opened, and the paper is lighted by a match inserted through the door l6. lowed to burn for to minutes, the gases of combustion passing out through the section 34 and chimney 35. The door 16 is then closed, the butterfly valve 31 is closed and the air regulating plate assembly 26, 21 is operated to provide an air opening 23 to the extent desired. The stove will then burn without any attention whatever for several days. In a stove approximately 5 feet in total height and, about 4 feet above the grate, about 1 feet square, and having a fuel capacity of about 150 pounds of anthracite coal or about 120 pounds of coal briquettes, the stove will burn, with no attention whatever as to fuel addition or ash removal for from 4 to '7 days, depending upon the extent of the air inlet opening 23. The fuel burns from the top downwardly. The air which is drawn through the pipe 22 is heated by the hot coal and the gases which pass through the pipe 33 are likewise heated by the bed of hot coal. The result is that a draft is created which can positively and simply be controlled by varying the extent of the opening 23. The burning is highly efiicient, the combustion being substantially perfect with little or no The fuel is alloss of unburned, combustible gases by passage of the same through the chimney.

For the best results, the pipes 22 and 33 are placed within the stove housing. It is possible to obtain some of the advantages of the invention, however, by disposing these pipes outside of the stove housing but against the housing so as to be in good heat relation thereto.

Various changes may be made in the construction of my stove without, however, departing from the novel principles thereof as pointed out in the claims.

What I claim as new and desire to protect by Letters Patent of the United States is:

1. A stove for burning coal or the like, wherein said fuel burns from the top downwardly, comprising a housing, a grate disposed therein and defining a fuel chamber and an ash pit, a chimney section adjacent the top of said housing, means for admitting coal to the fuel chamber through the top of said stove housing, a vertically arranged air inlet pipe disposed within the housing and in heat conducting relation to the fuel chamber, the air inlet opening of said pipe being below the level of the grate and the top of the pipe being above the top level of the coal when the stove is in operation, a vertically arranged gas outlet pipe disposed within the housing and in heat conducting relation to the fuel chamber, the bottom of said gas outlet pipe being slightly below the grate and the upper portion of said gas outlet pipe communicating with said chimney section, a valve in said chimney section, valve means for controlling the amount of air admitted to the air inlet pipe, and means, in the upper part of said stove housing, defining an opening at approximately the level of the top of the gas outlet pipe and through which the coal may be ignited, and means for closing said lastmentioned opening.

2. A stove for burning coal or the like, Wherein said fuel burns from the top downwardly, comprising a housing, a grate disposed at the lower portion thereof and defining a fuel chamber and an ash pit, a chimney section connected to the housing at one side thereof and adjacent the top of said housing, means for admitting coal to the fuel chamber from the top thereof, a vertically arranged air inlet pipe disposed within the housing and in heat conducting relation to the fuel chamber, the air inlet opening of said pipe being below the level of the grate and the top of the pipe being above the top level of the coal when the stove is in operation, a vertically arranged gas outlet pipe, spaced from the air inlet pipe, and disposed within the housing and in heat conducting relation to the fuel chamber,

the bottom of said gas outlet pipe being slightly below the grate and the upper portion of said gas outlet pipe being bent angularly and disposed within said chimney section, a valve in said chimney section, valve means for controlling the amount of air admitted to the air inlet pipe, and means, in the upper part of said stove housing, defining an opening at approximately the level of the top of the gas outlet pipe and through which the coal may be ignited, and means for closing said last-mentioned opening.

3. A stove for burning coal or the like, wherein said fuel burns from the top downwardly, comprising a housing, a grate disposed in the lower part thereof. and defining a fuel cham# her and an ash pit, a chimney section adjacent the top of said housing, means for admitting coal to the fuel chamber from the top of said housing, a vertically arranged air inlet pipe disposed within the housing and in heat conducting relation to the fuel chamber, the air inlet opening of said pipe being below the level of the grate and the top of the pipe being above the top level of the coal when the stove is in operation, a vertically arranged gas outlet pipe, spaced from said air inlet pipe, and disposed within the housing and in heat conducting relation to the fuel chamber, the bottom of said gas outlet pipe being slightly below the grate and the upper portion of said gas outlet pipe being bent angularly and disposed within said chimney section, a butterfly valve in said chimney section, and valve means for controlling the amount of air admitted to the air inlet pipe.

4. In a stove for burning coal or the like, wherein said fuel burns from the top downwardly, which comprises a housing, a grate disposed therein and defining a fuel chamber and an ash pit, a chimney section adjacent the top of said housing, and means for admitting coal to the fuel chamber, the improvements which comprise a vertically arranged air inlet pipe disposed within the housing and in heat conducting relation to the fuel chamber, the air inlet opening of said pipe being below the level of the grate and the top of the pipe being above the top level of the coal when the stove is in operation, and a vertically arranged gas outlet pipe, spaced from the air inlet pipe, and disposed within the housing and in heat conducting relation to the fuel chamber, the bottom of said gas outlet pipe being below the grate and the upper portion of said gas outlet pipe communicating with said chimney section.

5. A stove for burning coal or the like, wherein said fuel burns from the top downwardly, comprising a housing, a grate disposed therein and defining a fuel chamber and an ashpit, a

' chimney section adjacent the top of said housing, means for admitting coal to the fuel chamber, a vertically arranged air inlet pipe disposed within the housing and in heat conducting relation to the fuel chamber, the air inlet opening of said pipe being below the level of the grate and the top of the pipe being above the top level of the coal when the stove is in operation, a vertically arranged gas outlet pipe disposed within the housing and in heat conducting relation to the fuel chamber, the bottom of said gas outlet pipe being slightly below the grate and the upper portion of said gas outlet pipe communicating with said chimney section, a valve in said chimney section, and valve means for controlling the amount of air admitted to the air inlet pipe.

6. A, stove for burning coal or the like, wherein said fuel burns from the top downwardly, comprising a housing, a grate disposed therein and defining a fuel chamber and an ash pit, a chimney section adjacent the top of said housing, means for admitting coal to the fuel chamber, a vertically arranged air inlet pipe disposed in heat conducting relation to the fuel chamber, the air inlet opening of said pipe being adjacent the lower portion of said pipe and the top of the pipe being above the top level of the coal when the stove is in operation, a vertically arranged gas outlet pipe disposed in heat conducting relation to the fuel chamber, the bottom of said gas outlet pipe being below the grate and the upper portion of said gas outlet pipe communicating with said chimney section, and valve means for controlling the amount of air admitted to the air inlet pipe.

'7. In a stove for burning coal or the like, wherein said fuel burns from the top downwardly, which includes a housing, a grate disposed in the lower portion thereof and defining a fuel chamber and an ash pit, a chimney section adjacent the top of said housing, and means for admitting coal to the fuel chamber, the improvements which comprise a vertically arranged air inlet pipe associated with the housing, the air inlet opening of said pipe being at the lower portion thereof and the top of the pipe being above the top level of the coal when the stove is in operation, and a vertically arranged gas outlet pipe associated with the housing, the bottom of said gas outlet pipe being below the grate and the upper portion of said gas outlet pipe communicating with said chimney section.

8. In a stove for burning coal or the like, wherein said fuel burns from the top downwardly, which includes a housing, a grate disposed therein and defining a fuel chamber and an ash pit, a chimney section, having a valve therein, adjacent the top of said housing, and means for admitting coal to the fuel chamber from the top of the stove housing, the improvements which comprise a vertically arranged air inlet pipe associated with the housing, the air inlet opening of said pipe being at the lower portion thereof and the top of the pipe being above the top level of the coal when the stove is in operation, a vertically arranged gas outlet pipe associated with the housing and in heat conducting relation to the fuel chamber, the bottom of said gas outlet pipe being below the grate and the upper portion of said gas outlet pipe communicating with said chimney section, and valve means for controlling the amount of air admitted to the air inlet pipe.

EUGENE J. THEE. 

